Test Details
Mnemonic
CDT
Ordering Code
3686150
CPT-4 Code(s)
82373
Specimen Information
Collect
Serum separator tube (SST)
Specimen Preparation
Centrifuge, separate serum from cells and send 1.0 mL serum frozen in a screw capped plastic vial.
Alternate Specimen
Serum: Red top
Minimum Volume
0.2 mL
Transport Temperature
Frozen
Rejection Criteria
Plasma, hemolyzed specimens
Stability
Room temperature: Unacceptable
Refrigerated: 10 days
Frozen: 30 days
Refrigerated: 10 days
Frozen: 30 days
Methodology
Quantitative Electrophoresis
Reference Range
Normal: 0 - 1.3%
Inconclusive: 1.4 - 1.6%;
Elevated: ≥1.7%
Inconclusive: 1.4 - 1.6%;
Elevated: ≥1.7%
Performing Laboratory
ARUP
New York DOH Approval Status
Yes